I am fairly new to Linux but have had no trouble installing Ubuntu 14 recently and am looking to try other distributions. I have a small pile of Vista era Optiplex 740s that I think would be good candidates for my Mint experience but I'm having a little trouble with the installation. The machines have an AMD Athalon 64 3500+ processor, at least 2 GB RAM and a fresh 160GB hard drive. I burned a DVD image from the iso of Mint 17.2 Rafaela 64bit with Cinnamon first. After POSTing the DVD starts and the Mint start menu comes up with the "Start Linux Mint" option that I select. After a few seconds the screen turns grey with a blinking cursor at the top and then the system reboots and I'm back at the beginning in a loop. I have tried both the 64 bit and 32 bit versions of Mint with the same result. I have also tried this on more than one machine. I have fast boot disabled and everything I can think of looks to me like it should work. I have the Mint user manual and haven't found a solution there. Do any of you more experienced Linux users have any suggestions?